Manual disconnector MD500
1 and 2 pole modular, manual disconnectors up to 500 amps
MD521-500-15-U2 1 pole modular, manual disconnectors up to 500 amps
With the MD500 series, Schaltbau supplies a new developed manually operated disconnector specifically for the use of high-performance high-voltage battery packs for traction applications in rail vehicles.
This technology is increasingly being used in battery and hydrogen-powered vehicles, but also in rail vehicles with storage-hybrid drive systems. In the application, the disconnector can conduct currents of up to 500 amps – thanks to the new, patented contact system without noticeable power loss. In the event of a fault, the switch’s robust contact system is dimensioned for carrying very high short-circuit currents of up to 30,000 amps for a short time. Thus, after the damage event or in case of maintenance, the battery can be disconnected from the circuit without load.
Features
Ergonomic hand knob
Manual actuator with integrated safety catch for secure locking of the operating position; Two positions:
ON = operating position, OFF = disconnected position
Patented contact system
An extremely low contact resistance in the contact system (< 100 µΩ) and a very high rated short-time withstand current (30,000 A @ 100 ms) for years of continuous operation. 1- and 2*-pole versions available.
* In planning
Modularity
The positions on the right, top, left of the main contacts can be freely configured in relation to each other in 90° steps.
Mechanical locking
In the disconnected position by means of an optional padlock against unintentional reconnection
2 auxiliary switches
S870 snap-action switch with silver or gold contacts as well as positive opening for diagnosis and switching status monitoring.
Specifications
Electrical data of main circuit
| Type of voltage | DC, AC (f ≥ 60 Hz) |
| Nominal voltage Un | 1,500 V |
| Rated operating voltage Ue | 1,800 V |
| Rated insulation voltage UNm | 1,800 V |
| Rated impulse withstand voltage UNi | 8 kV |
| Pollution degree | PD2 |
| Overvoltage category | OV2 |
| Conv. thermal current Ith | 250 A / 500 A |
| Component category | B-C1 |
| Rated short-time withstand voltage Icw | 30 kA @ T < 100 ms |
Drive
| Actuator | Manually operated, Integrated safety catch for locking in operating position; Mechanical locking option in disconnected position |
Auxiliary contacts
| Number, configuration | 2x max. snap-action switches S870, SPDT |
General data
| Vibration, Shock | Category 1, class B |
| Mechanical endurance | 5,000 operating cycles |
| Mounting orientation | horizontal, vertical |
| Temperature range | –40° C ... +70° C |
| Weight | approx. 1.1 kg |
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